Finding the Fourth Proportional to 31,007.90, 42,741.77 and 28,433.67

Step by Step Solution

1. Step 1: Write the proportion equation
   31,007.90 : 42,741.77 = 28,433.67 : x
2. Step 2: Convert to fraction form
   31,007.90/42,741.77 = 28,433.67/x
3. Step 3: Cross multiply
   31,007.90x = 42,741.77 × 28,433.67
4. Step 4: Simplify right side
   31,007.90x = 1,215,305,241.23
5. Step 5: Solve for x
   x = 1,215,305,241.23/31,007.90
6. Step 6: Final answer
   x = 39,193.41